Control apparatus of vehicle

Abstract

In a vehicle, which is provided with: a primary turbo and a secondary turbo, each of which is of an exhaust driven type; an exhaust changeover valve and an intake changeover valve, which are placed in a secondary exhaust passage and a secondary intake passage corresponding to the secondary turbo, respectively; and an intake bypass valve placed in an intake bypass passage, an ECU sets the opening/closing state of each changeover valve to an opening/closing state corresponding to a twin turbo mode at the time of engine stop, and it uses the drive control of each changeover valve which is necessitated in the transition to a single turbo mode at the engine start, thereby performing the sticking detection of the changeover valve at the same time.

The invention claimed is: 
     
       1. A control apparatus of a vehicle,
 the vehicle comprising: 
 an internal combustion engine; 
 a supercharging system including a first supercharger and a second supercharger each of which is driven by an exhaust gas of the internal combustion engine; and 
 at least one changeover valve which is placed in at least one of an intake passage and an exhaust passage of the internal combustion engine and which changes a supercharging mode associated with the supercharging system among a plurality of supercharging modes including a single supercharging mode for performing supercharging only with the first supercharger and a twin supercharging mode for performing supercharging with both the first and second superchargers, in accordance with an opening/closing state, 
 said control apparatus comprising: 
 a first controlling device which is configured to control the changeover valve at the time of engine stop of the internal combustion engine such that the opening/closing state is an opening/closing state corresponding to a supercharging mode which is different from a supercharging mode to be selected at the start of the internal combustion engine and which is to be selected in an operating area on a higher-load side than at the start from among the plurality of supercharging modes; and 
 a second controlling device which is configured to control the changeover valve at the start of the internal combustion engine such that the opening/closing state is an opening/closing state corresponding to the supercharging mode to be selected at the start. 
 
     
     
       2. The control apparatus of the vehicle according to  claim 1 , wherein
 the supercharging system is a parallel supercharging system in which each of the first and second superchargers independently performs supercharging, and 
 the changeover valve includes at least an exhaust changeover valve placed in the exhaust passage corresponding to the second supercharger and an intake changeover valve placed in the intake passage corresponding to the first supercharger. 
 
     
     
       3. The control apparatus of the vehicle according to  claim 2 , wherein
 said first controlling device controls each of the exhaust changeover valve and the intake changeover valve to be in a fully-opened state at the time of engine stop, and 
 said second controlling device controls each of the exhaust changeover valve and the intake changeover valve to be in a fully-closed state at the start. 
 
     
     
       4. The control apparatus of the vehicle according to  claim 1 , further comprising:
 a specifying device which is configured to specify the opening/closing state; and 
 a judging device which is configured to judge whether or not the changeover valve is in a sticking state on the basis of the specified opening/closing state when the opening/closing state is controlled, at the start, to be in the opening/closing state corresponding to the supercharging mode to be selected at the start.